90493045 has 4 divisors (see below), whose sum is σ = 108591660. Its totient is φ = 72394432.

The previous prime is 90493037. The next prime is 90493049. The reversal of 90493045 is 54039409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19158129 + 71334916 = 4377^2 + 8446^2 .

It is a cyclic number.

It is not a de Polignac number, because 90493045 - 2³ = 90493037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90493045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90493049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9049300 + ... + 9049309.

It is an arithmetic number, because the mean of its divisors is an integer number (27147915).

Almost surely, 2^90493045 is an apocalyptic number.

It is an amenable number.

90493045 is a deficient number, since it is larger than the sum of its proper divisors (18098615).

90493045 is a wasteful number, since it uses less digits than its factorization.

90493045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18098614.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90493045 is about 9512.7832415124. The cubic root of 90493045 is about 448.9573308129.

The spelling of 90493045 in words is "ninety million, four hundred ninety-three thousand, forty-five".